Cho and the overall lore of Pandaria was some of the best stuff in the game to date. The place actually felt like it had an ancient history to it, one that shaped the present day... that we happened to fall face-first into.
Regarding Draenor... I am disappoint.
I suspect the reason Pandaria's history was so interesting (the Mantid and Klaxxi alone are great) was because the devs had free rein to create what they pleased. In Draenor, everything is going to have to fit into that historical mold set up by WC 1 and 2.